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		[page:Object3D] &rarr;

		<h1>[name]</h1>

		<div class="desc">An 3D arrow object for visualizing directions.</div>


		<h2>Example</h2>

		<div>[example:webgl_geometries WebGL / geometries]</div>
		<div>[example:webgl_geometry_normals WebGL / geometry / normals]</div>
		<div>[example:webgl_shadowmesh WebGL / shadowmesh]</div>

		<code>
		var dir = new THREE.Vector3( 1, 2, 0 );

		//normalize the direction vector (convert to vector of length 1)
		dir.normalize();

		var origin = new THREE.Vector3( 0, 0, 0 );
		var length = 1;
		var hex = 0xffff00;

		var arrowHelper = new THREE.ArrowHelper( dir, origin, length, hex );
		scene.add( arrowHelper );
		</code>



		<h2>Constructor</h2>


		<h3>[name]([page:Vector3 dir], [page:Vector3 origin], [page:Number length], [page:Number hex], [page:Number headLength], [page:Number headWidth] )</h3>
		<div>
		[page:Vector3 dir] -- direction from origin. Must be a unit vector. <br />
		[page:Vector3 origin] -- Point at which the arrow starts.<br />
		[page:Number length] -- length of the arrow. Default is *1*.<br />
		[page:Number hex] -- hexadecimal value to define color. Default is 0xffff00.<br />
		[page:Number headLength] -- The length of the head of the arrow. Default is 0.2 * length.<br />
		[page:Number headWidth] -- The length of the width of the arrow. Default is 0.2 * headLength.
		</div>

		<h2>Properties</h2>
		<div>See the base [page:Object3D] class for common properties.</div>


		<h3>[property:Line line]</h3>
		<div>Contains the line part of the arrowHelper.</div>

		<h3>[property:Mesh cone]</h3>
		<div>Contains the cone part of the arrowHelper.</div>




		<h2>Methods</h2>
		<div>See the base [page:Object3D] class for common methods.</div>



		<h3>[method:null setColor]([page:Number hex])</h3>
		<div>
		hex -- The hexadicmal value of the color.<br /><br />

		Sets the color of the arrowHelper.
		</div>

		<h3>[method:null setLength]([page:Number length], [page:Number headLength], [page:Number headWidth])</h3>
		<div>
		length -- The desired length.<br />
		headLength -- The length of the head of the arrow.<br />
		headWidth -- The length of the width of the arrow.<br /><br />

		Sets the length of the arrowhelper.
		</div>

		<h3>[method:null setDirection]([page:Vector3 dir])</h3>
		<div>
		dir -- The desired direction. Must be a unit vector.<br /><br />

		Sets the direction of the arrowhelper.
		</div>

		<h2>Source</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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